Sounds like a rock and a hard place for that salesperson.Not this shop. They would just push ScubaPro over everything else. Honesty was not in their business model. I believe they also used the “life support equipment” line as well.
I looked at both. While I didn’t hate the Knighthawk, I preferred the Stiletto. Still do. My buddy just switched to a Stiletto from a Knighthawk, and immediately preferred it. When a customer asks to look at a specific model, you show them what they asked for. My Stiletto has held up well. If I were to buy again, and choose between Stiletto and Knighthawk, I’d make the same choice.
If in the fullness of time, you'd come to prefer the Knighthawk and not the Stiletto, you'd have blamed the salesperson if he/she hadn't tried to convince you that it was a better purchase.